We have these on all beds:
Despite the waterproof layer on the bottom, no one has ever commented on it, and in my opinion, once the beds are made up you’d be hard pushed to know it’s there. Cheap enough to have spares, just in case.
Saved our mattresses from more than one little lady’s nocturnal accident, and other bodily fluids…
Interestingly, we had a supply of sanitary pads in one apartment but not the other. The other had a few accidents, but the one with pads rarely did. Since making sure there is a supply in both apartments, we’ve been menstrual blood free now for a year or so. One of those why didn’t we think of that before moments!
JF